Loughborough University, School of Sport Exercise and Health Sciences, Loughborough, UK.
Med Sci Sports Exerc. 2010 Mar;42(3):608-13. doi: 10.1249/MSS.0b013e3181b72cbc.
To examine the validity of perception-based intensity regulation during handcycling exercise.
Eight spinal cord-injured (T11 incomplete to T4 complete) participants completed an incremental exercise test followed by a (.)VO2peak test using a sports hand bike. Subsequently, two 20-min exercise tests were completed at an individualized power output (PO) at moderate and vigorous intensities (50% and 70% of (.)VO2peak, respectively). On a separate occasion, participants were instructed to produce and maintain a workload equivalent to the average RPE for the 20-min imposed condition in a counterbalanced order. The (.)VO2 and blood lactate concentration [BLa(-)] were measured every 10 min, and HR and PO were measured at 1-min intervals.
There were no differences in average (.)VO2, percent V O2peak, HR, PO, and [BLa(-)] between the imposed PO conditions and RPE-regulated trials of either exercise intensity. Although PO increased slightly during the moderate-intensity RPE-regulated trial (P < 0.04), it remained relatively constant in the vigorous RPE-regulated trial. However, there was a tendency for PO to be slightly higher (P = 0.07) in the vigorous RPE-regulated trial.
These data suggest that RPE is effective in controlling moderate and vigorous intensities throughout a 20-min handcycling exercise session for SCI participants.
检验手控自行车运动中基于感知的强度调节的有效性。
8 名脊髓损伤（T11 不完全至 T4 完全损伤）参与者完成递增运动测试，然后使用运动型手自行车进行峰值摄氧量（VO2peak）测试。随后，以个体化功率输出（PO）在中等和剧烈强度（分别为 50%和 70%的 VO2peak）下完成两次 20 分钟的运动测试。在另一次测试中，参与者被指示以交替顺序产生并维持与 20 分钟强制条件下平均 RPE 等效的工作量。每 10 分钟测量一次 VO2 和血乳酸浓度 [BLa(-)]，每 1 分钟测量一次 HR 和 PO。
在强制 PO 条件和 RPE 调节的两种运动强度的试验中，平均 VO2、VO2peak 的百分比、HR、PO 和 [BLa(-)] 没有差异。虽然中等强度 RPE 调节试验中 PO 略有增加（P < 0.04），但在剧烈强度 RPE 调节试验中 PO 相对稳定。然而，在剧烈 RPE 调节试验中，PO 略有升高的趋势（P = 0.07）。
这些数据表明，RPE 在手控自行车运动 20 分钟运动过程中能有效控制中等和剧烈强度。
